glam/schemas/20251121/linkml/modules/classes/ConservationRecord.yaml
2026-01-02 02:11:04 +01:00

729 lines
25 KiB
YAML

# ConservationRecord Class
# Models condition assessments and conservation treatments for heritage objects
#
# Created January 2026 to track:
# - Condition assessments (pre-loan, periodic, post-treatment)
# - Conservation treatments (cleaning, stabilization, restoration)
# - Technical examinations (X-ray, infrared, spectroscopy)
# - Environmental monitoring records
#
# Key relationships:
# ExhibitedObject --conservation_records--> ConservationRecord[]
# ConservationRecord --condition_status--> ConservationStatusEnum
# ConservationRecord --timespan--> TimeSpan
#
# Example: Girl with a Pearl Earring 1994 restoration by Jorgen Wadum
id: https://nde.nl/ontology/hc/class/ConservationRecord
name: ConservationRecord
title: Conservation Record Class
prefixes:
linkml: https://w3id.org/linkml/
hc: https://nde.nl/ontology/hc/
schema: http://schema.org/
crm: http://www.cidoc-crm.org/cidoc-crm/
dcterms: http://purl.org/dc/terms/
skos: http://www.w3.org/2004/02/skos/core#
aat: http://vocab.getty.edu/aat/
imports:
- linkml:types
- ../metadata
- ./TimeSpan
- ../enums/ConservationStatusEnum
default_prefix: hc
classes:
ConservationRecord:
class_uri: crm:E14_Condition_Assessment
annotations:
custodian_types: '["G", "M", "A", "L", "R", "H", "B"]'
custodian_types_rationale: |
ConservationRecord is relevant to all custodian types managing physical collections:
Galleries (G), Museums (M), Archives (A), Libraries (L), Research Centers (R),
Holy Sites (H) with artifacts, and Botanical gardens/zoos (B) for specimen conservation.
description: |
A record of condition assessment, conservation treatment, or technical examination
performed on a heritage object.
Models THREE types of conservation documentation:
1. **Condition Assessment**: Periodic evaluation of object state
2. **Treatment Record**: Documentation of conservation intervention
3. **Technical Examination**: Scientific analysis (imaging, spectroscopy)
**Key Distinction**:
| Concept | Class | Description |
|---------|-------|-------------|
| Object metadata | ExhibitedObject | Basic object information |
| Ownership history | ProvenanceEvent | Custody transfers |
| **Physical state/treatment** | **ConservationRecord** | **Condition and conservation** |
| Loan documentation | Loan | Custody for loans |
**Ontology Alignment**:
- **CIDOC-CRM**: crm:E14_Condition_Assessment (for assessments)
"The activity of assessing the condition of an object."
- **CIDOC-CRM**: crm:E11_Modification (for treatments)
"The action of modifying physical features of an object."
- **Schema.org**: schema:HowTo (treatment procedures)
**SPECTRUM Alignment**:
Aligns with SPECTRUM procedures:
- Object Condition Checking
- Conservation and Collection Care
- Risk Management
**Example**:
1994 restoration of "Girl with a Pearl Earring":
- record_type: TREATMENT
- condition_before: FAIR (yellowed varnish, dirt)
- condition_after: EXCELLENT
- treatment_description: Cleaning, varnish removal, retouching
- conservator: Dr. Jørgen Wadum
exact_mappings:
- crm:E14_Condition_Assessment
close_mappings:
- crm:E11_Modification
- aat:300054795 # conservation (discipline)
- aat:300054796 # restoration (discipline)
related_mappings:
- schema:HowTo
- crm:E7_Activity
slots:
- record_id
- object_ref
- record_type
- record_date
- record_timespan
- condition_before
- condition_after
- condition_description
- treatment_description
- treatment_type
- conservator
- conservator_affiliation
- conservation_lab
- materials_used
- techniques_used
- examination_methods
- environmental_conditions
- photographs
- report_url
- report_document
- recommendations
- follow_up_date
- related_loan
- cost
- cost_currency
- funding_source
- conservation_notes
slot_usage:
record_id:
identifier: true
required: true
range: uriorcurie
slot_uri: dcterms:identifier
description: |
Unique identifier for this conservation record.
Format: https://nde.nl/ontology/hc/conservation/{object-slug}-{year}-{seq}
examples:
- value: "https://nde.nl/ontology/hc/conservation/mauritshuis-670-1994-001"
- value: "https://nde.nl/ontology/hc/conservation/rijksmuseum-sk-c-5-2019-001"
object_ref:
required: true
range: uriorcurie
inlined: false
slot_uri: crm:P140_assigned_attribute_to
description: |
Reference to the object this record documents.
CIDOC-CRM: P140_assigned_attribute_to - "identifies the E1 CRM Entity
to which an attribute or relation was assigned."
examples:
- value: "https://nde.nl/ontology/hc/object/mauritshuis-girl-pearl-earring"
record_type:
required: true
range: string
slot_uri: dcterms:type
description: |
Type of conservation record.
Values:
- CONDITION_ASSESSMENT: Evaluation of current state
- TREATMENT: Conservation intervention
- EXAMINATION: Technical/scientific analysis
- LOAN_CONDITION_CHECK: Pre/post loan inspection
- ENVIRONMENTAL_MONITORING: Climate/light monitoring
- PEST_MONITORING: IPM inspection
examples:
- value: "TREATMENT"
- value: "CONDITION_ASSESSMENT"
- value: "EXAMINATION"
record_date:
required: false
range: date
slot_uri: schema:dateCreated
description: |
Date the assessment, treatment, or examination was performed.
examples:
- value: "1994-06-15"
record_timespan:
required: false
range: TimeSpan
inlined: true
slot_uri: crm:P4_has_time-span
description: |
Full temporal extent of the conservation activity.
Use for treatments spanning multiple dates.
examples:
- value:
begin_of_the_begin: "1994-03-01"
end_of_the_end: "1994-09-30"
description: "Six-month restoration project"
condition_before:
required: false
range: ConservationStatusEnum
slot_uri: crm:P44_has_condition
description: |
Condition state before treatment or at start of assessment.
Values: EXCELLENT, GOOD, FAIR, POOR, CRITICAL, STABLE, UNSTABLE, DETERIORATING
examples:
- value: FAIR
description: "Yellowed varnish, surface dirt"
condition_after:
required: false
range: ConservationStatusEnum
slot_uri: crm:P44_has_condition
description: |
Condition state after treatment.
Only applicable for TREATMENT record types.
examples:
- value: EXCELLENT
description: "After cleaning and restoration"
condition_description:
required: false
range: string
slot_uri: crm:P3_has_note
description: |
Detailed narrative description of the object's condition.
Include specific observations about damage, wear, or deterioration.
examples:
- value: |
The varnish had yellowed significantly, obscuring the delicate
tonal gradations. Surface dirt accumulation in lower quadrant.
Old retouching visible under UV light in background area.
Canvas stable with no active distortions.
treatment_description:
required: false
range: string
slot_uri: schema:description
description: |
Detailed description of conservation treatment performed.
Include methodology, materials, and techniques.
examples:
- value: |
Treatment involved removal of discolored natural resin varnish
using acetone-based solvent mixture. Old retouching removed from
background. Losses in-painted with conservation-grade reversible
paints. Final protective varnish layer applied (dammar in turpentine).
treatment_type:
required: false
range: string
multivalued: true
slot_uri: aat:300404522
description: |
Classification of treatment performed.
Common values:
- CLEANING: Surface cleaning, varnish removal
- STABILIZATION: Structural consolidation
- RESTORATION: In-painting, filling losses
- PREVENTIVE: Environmental protection
- REFRAMING: New frame, glazing, backing
- RELINING: Canvas reinforcement
- DEACIDIFICATION: Paper treatment
examples:
- value: "CLEANING"
- value: "RESTORATION"
- value: "REFRAMING"
conservator:
required: false
range: string
multivalued: true
slot_uri: crm:P14_carried_out_by
description: |
Name(s) of conservator(s) who performed the work.
examples:
- value: "Dr. Jørgen Wadum"
- value: "Petria Noble"
conservator_affiliation:
required: false
range: string
slot_uri: schema:affiliation
description: |
Institutional affiliation of the conservator.
examples:
- value: "Mauritshuis Conservation Department"
- value: "Hamilton Kerr Institute"
conservation_lab:
required: false
range: string
slot_uri: schema:location
description: |
Conservation laboratory where work was performed.
examples:
- value: "Mauritshuis Conservation Studio, The Hague"
- value: "Rijksmuseum Ateliergebouw"
materials_used:
required: false
range: string
multivalued: true
slot_uri: crm:P126_employed
description: |
Materials and supplies used in treatment.
Critical for reversibility and future treatments.
examples:
- value: "Dammar varnish (Kremer Pigmente)"
- value: "Paraloid B-72 consolidant"
- value: "Japanese tissue paper"
- value: "Gamblin conservation colors"
techniques_used:
required: false
range: string
multivalued: true
slot_uri: crm:P32_used_general_technique
description: |
Techniques employed in treatment.
examples:
- value: "Solvent cleaning with acetone/white spirit mixture"
- value: "Tratteggio inpainting technique"
- value: "Vacuum lining"
examination_methods:
required: false
range: string
multivalued: true
slot_uri: crm:P16_used_specific_object
description: |
Technical examination methods used.
Common methods:
- X-RADIOGRAPHY: X-ray imaging
- INFRARED_REFLECTOGRAPHY: IR imaging of underdrawing
- UV_FLUORESCENCE: UV light examination
- RAKING_LIGHT: Surface texture analysis
- MACRO_PHOTOGRAPHY: Detailed surface photography
- XRF: X-ray fluorescence spectroscopy
- FTIR: Fourier-transform infrared spectroscopy
examples:
- value: "X-RADIOGRAPHY"
- value: "INFRARED_REFLECTOGRAPHY"
- value: "UV_FLUORESCENCE"
- value: "MACRO_PHOTOGRAPHY"
environmental_conditions:
required: false
range: string
slot_uri: crm:P3_has_note
description: |
Environmental conditions during examination or treatment,
or recommended environmental parameters.
examples:
- value: "Treatment performed at 21°C, 50% RH. Object stable in current conditions."
- value: "Recommended: 45-55% RH, 18-22°C, max 50 lux"
photographs:
required: false
range: uri
multivalued: true
slot_uri: schema:image
description: |
URLs to conservation photographs (before, during, after treatment).
examples:
- value: "https://mauritshuis.nl/conservation/670/before-treatment-1994.jpg"
- value: "https://mauritshuis.nl/conservation/670/during-cleaning-1994.jpg"
- value: "https://mauritshuis.nl/conservation/670/after-treatment-1994.jpg"
report_url:
required: false
range: uri
slot_uri: schema:url
description: |
URL to full conservation report (PDF or web page).
examples:
- value: "https://mauritshuis.nl/conservation/reports/670-1994-restoration.pdf"
report_document:
required: false
range: string
slot_uri: dcterms:bibliographicCitation
description: |
Bibliographic citation for published conservation report or article.
examples:
- value: |
Wadum, Jørgen. "Vermeer Illuminated: The Restoration of
Girl with a Pearl Earring." Burlington Magazine 137,
no. 1103 (1995): 90-95.
recommendations:
required: false
range: string
multivalued: true
slot_uri: skos:note
description: |
Recommendations for future care, display, or treatment.
examples:
- value: "Re-examine varnish layer in 25 years"
- value: "Display in climate-controlled case only"
- value: "Limit light exposure to 50 lux maximum"
- value: "Handle with cotton gloves; fragile frame corners"
follow_up_date:
required: false
range: date
description: |
Date for recommended follow-up examination.
examples:
- value: "2019-01-01"
description: "25-year follow-up from 1994 restoration"
related_loan:
required: false
range: uriorcurie
inlined: false
description: |
Loan associated with this condition record (for loan condition checks).
examples:
- value: "https://nde.nl/ontology/hc/loan/mauritshuis-rijksmuseum-2023-001"
cost:
required: false
range: decimal
slot_uri: schema:price
description: |
Cost of conservation treatment.
examples:
- value: 150000
description: "€150,000 for major restoration"
cost_currency:
required: false
range: string
slot_uri: schema:priceCurrency
description: |
Currency code for cost (ISO 4217).
examples:
- value: "EUR"
- value: "USD"
funding_source:
required: false
range: string
slot_uri: schema:funder
description: |
Source of funding for conservation work.
examples:
- value: "Mondriaan Fund"
- value: "Getty Foundation"
- value: "Bank Giro Loterij"
conservation_notes:
required: false
range: string
multivalued: true
slot_uri: skos:note
description: |
Additional notes about the conservation record.
examples:
- value: "Treatment coincided with preparation for 1995 exhibition"
- value: "Discovery of Vermeer's signature during cleaning"
comments:
- "ConservationRecord documents condition assessments, treatments, and examinations"
- "Links to ExhibitedObject via object_ref relationship"
- "Uses ConservationStatusEnum for condition_before and condition_after"
- "Uses CIDOC-CRM E14_Condition_Assessment as primary mapping"
- "Aligns with SPECTRUM Object Condition Checking procedure"
- "Supports both institutional and external conservation documentation"
see_also:
- "https://cidoc-crm.org/html/cidoc_crm_v7.1.3.html#E14"
- "https://cidoc-crm.org/html/cidoc_crm_v7.1.3.html#E11"
- "https://collectionstrust.org.uk/spectrum/"
- "https://www.culturalheritage.org/"
examples:
- value:
record_id: "https://nde.nl/ontology/hc/conservation/mauritshuis-670-1994-001"
object_ref: "https://nde.nl/ontology/hc/object/mauritshuis-girl-pearl-earring"
record_type: "TREATMENT"
record_timespan:
begin_of_the_begin: "1994-03-01"
end_of_the_end: "1994-09-30"
condition_before: FAIR
condition_after: EXCELLENT
condition_description: |
The painting's varnish had yellowed significantly over time,
obscuring the delicate tonal gradations that are characteristic
of Vermeer's technique. Surface dirt had accumulated, particularly
in the lower portion. Previous restorations from the early 20th
century were visible under UV examination.
treatment_description: |
Comprehensive restoration including: removal of discolored varnish
using carefully calibrated solvent mixtures; cleaning of accumulated
surface grime; removal of disfiguring old retouches; consolidation
of minor paint losses; minimal inpainting using reversible materials;
application of new protective varnish.
treatment_type:
- "CLEANING"
- "RESTORATION"
conservator:
- "Dr. Jørgen Wadum"
conservator_affiliation: "Mauritshuis Conservation Department"
conservation_lab: "Mauritshuis Conservation Studio, The Hague"
materials_used:
- "Shellsol A solvent"
- "Dammar varnish (Kremer)"
- "Gamblin conservation colors"
techniques_used:
- "Solvent cleaning"
- "Tratteggio inpainting"
examination_methods:
- "X-RADIOGRAPHY"
- "INFRARED_REFLECTOGRAPHY"
- "UV_FLUORESCENCE"
- "MACRO_PHOTOGRAPHY"
photographs:
- "https://mauritshuis.nl/conservation/670/before-1994.jpg"
- "https://mauritshuis.nl/conservation/670/during-1994.jpg"
- "https://mauritshuis.nl/conservation/670/after-1994.jpg"
report_document: |
Wadum, Jørgen. "Vermeer Illuminated: Conservation, Restoration and
Research." The Hague: Mauritshuis, 1995.
recommendations:
- "Re-examine varnish layer in 25 years (c. 2019)"
- "Maintain 45-55% relative humidity"
- "Maximum 50 lux illumination"
follow_up_date: "2019-01-01"
conservation_notes:
- "Vermeer's monogram 'IVMeer' discovered during cleaning"
- "Treatment documented in Burlington Magazine (1995)"
description: "1994 restoration of Girl with a Pearl Earring"
- value:
record_id: "https://nde.nl/ontology/hc/conservation/mauritshuis-670-2023-001"
object_ref: "https://nde.nl/ontology/hc/object/mauritshuis-girl-pearl-earring"
record_type: "LOAN_CONDITION_CHECK"
record_date: "2023-02-09"
condition_before: EXCELLENT
condition_description: |
Pre-loan condition check for Vermeer 2023 exhibition at Rijksmuseum.
Painting in excellent stable condition. No changes from previous
examination. Surface clean, varnish clear, frame secure.
related_loan: "https://nde.nl/ontology/hc/loan/mauritshuis-rijksmuseum-2023-001"
conservator:
- "Abbie Vandivere"
examination_methods:
- "RAKING_LIGHT"
- "UV_FLUORESCENCE"
recommendations:
- "Cleared for loan"
- "Courier required for transport"
- "Climate case recommended"
description: "Pre-loan condition check for Vermeer 2023"
- value:
record_id: "https://nde.nl/ontology/hc/conservation/rijksmuseum-sk-c-5-2019-001"
object_ref: "https://nde.nl/ontology/hc/object/rijksmuseum-night-watch"
record_type: "EXAMINATION"
record_date: "2019-07-08"
condition_before: GOOD
condition_description: |
Comprehensive technical examination as part of Operation Night Watch.
Canvas shows historical damage from 1715 trimming and 1911/1975 attacks.
Paint layer stable with localized losses. Varnish slightly yellowed.
examination_methods:
- "X-RADIOGRAPHY"
- "MACRO_XRF_SCANNING"
- "INFRARED_REFLECTOGRAPHY"
- "3D_SCANNING"
- "MACRO_PHOTOGRAPHY"
conservator:
- "Petria Noble"
- "Robert Erdmann"
conservator_affiliation: "Rijksmuseum Conservation Department"
report_url: "https://www.rijksmuseum.nl/en/stories/operation-night-watch"
conservation_notes:
- "Part of multi-year Operation Night Watch project"
- "Largest and most detailed examination ever of this painting"
- "Live-streamed to public"
description: "Operation Night Watch technical examination"
# Slot definitions
slots:
record_id:
description: Unique identifier for this conservation record
range: uriorcurie
slot_uri: dcterms:identifier
object_ref:
description: Reference to the object this record documents
range: uriorcurie
slot_uri: crm:P140_assigned_attribute_to
record_type:
description: Type of conservation record
range: string
slot_uri: dcterms:type
record_date:
description: Date of assessment, treatment, or examination
range: date
slot_uri: schema:dateCreated
record_timespan:
description: Full temporal extent of conservation activity
range: TimeSpan
slot_uri: crm:P4_has_time-span
condition_before:
description: Condition state before treatment
range: ConservationStatusEnum
slot_uri: crm:P44_has_condition
condition_after:
description: Condition state after treatment
range: ConservationStatusEnum
slot_uri: crm:P44_has_condition
condition_description:
description: Detailed narrative condition description
range: string
slot_uri: crm:P3_has_note
treatment_description:
description: Detailed description of conservation treatment
range: string
slot_uri: schema:description
treatment_type:
description: Classification of treatment performed
range: string
multivalued: true
slot_uri: aat:300404522
conservator:
description: Name(s) of conservator(s)
range: string
multivalued: true
slot_uri: crm:P14_carried_out_by
conservator_affiliation:
description: Institutional affiliation of conservator
range: string
slot_uri: schema:affiliation
conservation_lab:
description: Conservation laboratory location
range: string
slot_uri: schema:location
materials_used:
description: Materials and supplies used in treatment
range: string
multivalued: true
slot_uri: crm:P126_employed
techniques_used:
description: Techniques employed in treatment
range: string
multivalued: true
slot_uri: crm:P32_used_general_technique
examination_methods:
description: Technical examination methods used
range: string
multivalued: true
slot_uri: crm:P16_used_specific_object
environmental_conditions:
description: Environmental conditions or recommendations
range: string
slot_uri: crm:P3_has_note
photographs:
description: URLs to conservation photographs
range: uri
multivalued: true
slot_uri: schema:image
report_url:
description: URL to full conservation report
range: uri
slot_uri: schema:url
report_document:
description: Bibliographic citation for report
range: string
slot_uri: dcterms:bibliographicCitation
recommendations:
description: Recommendations for future care
range: string
multivalued: true
slot_uri: skos:note
follow_up_date:
description: Date for recommended follow-up
range: date
related_loan:
description: Associated loan record
range: uriorcurie
cost:
description: Cost of conservation treatment
range: decimal
slot_uri: schema:price
cost_currency:
description: Currency code for cost
range: string
slot_uri: schema:priceCurrency
funding_source:
description: Source of funding for conservation
range: string
slot_uri: schema:funder
conservation_notes:
description: Additional notes
range: string
multivalued: true
slot_uri: skos:note